Question

A block of wood is kept on the tabletop. The mass of the object is 5kg and its dimensions are 40×20×10cm. Find the pressure exerted by the wooden block on the top

Answer 1

Answer:

Mass of the wooden block = m= 5 kgdimensions = 40 cm × 20 cm × 10 cm

the weight of the wooden block applies a thrust on the table top.That is,Thrust = F = mg= 5 kg × 9.8 m/s²= 49 N

Area of a side = length × breadth

= 20 cm × 10 cm

= 200 cm²

= 0.02 m²

Pressure = thrust/ area

Pressure = 49 /0.02= 2450 N/m²

The same thrust in implied when it lies on the given dimension. 

Area= length × breadth= 40 × 20= 800= 0.08 m²

Pressure = 49/0.08= 612.5 

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